426 big bore

hey guys, buddy of mine is looking at getting a 4stroke thumper, and hes found a couple to look at. but my question is, one of them is a 426 with a supposed 486 big bore, but i cant find any 486 big bores available for the 426. is it something that they used to make, but discontinued? is it a reliable kit? any info would be great, thanks

A 2mm overbore in a 426 comes out 444cc. 2mm is about as big as is practical, and a 3mm, if anyone ever made one, would be 453cc. 486 would require a 101mm bore, whereas the stock cylinder is 95. Even if someone had used a 2mm overbore and used a stroker kit to reach 486, they'd have to add a whopping 6mm to the stroke.

The Marine Corps brass refers to this sort of thing as Bovine Scatology, but the Marines in the field just call it "BS".

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now